Endless-chain saw



E. NUNAN.

Endless-Chain Saw,

No. 226,774 Patented April 20, 1880.

El) WA R D N UNAN, OF SAN FRANCISCO, CALIFORNIA.

ENDLESS-CHAIN SAW.

SPECIFICATION forming part of Letters Patent No. 226,774, dated April 20, 1880.

To all whom it may cone e it known the city and county of State of Saws for Felling and reference being which form part of this My invention relates struetion of endless saws and mode of operatpurpose,

ing them for the felling trees and and it has for its cuttin object and inexpensive endless saw which It consists in an band composed of disks or pulleys with angular; peripheries or propel it with a regular continuous motion.

A means for feeding thi cutting progresses is also employed.

Referring to the said a plan view composed. tion of sections with do I make the segments A back or bearing-surface flat portions of the surface of th or disks,

outer edge, of an angul short rivet liush surtlice on both that I,

San Francisco, in the California, have invented a certain new and useful Improv Cutting up Trees; and I (lo/hereby declare that the follo iullfclear, and exact description of to the accompanying drawings, and the letters of reference thereon,

e capacity to work rapidly and efficiently.

endless flexible segments or 01 my improved saw. Fig. 2 is cutting-surface, b, on the I join these sections to- Application filed June 12, 1879.

bend and turn around the supporting and EDWARD driving disks.

I make the segments or sections to compose one tooth, as at A, or several teeth orcut-tingedges, as at A, and I join them by overlapping their ends alternately upon and beneath one another, as shown at the 1, so that between the back or tooth end of the next one on NUNAN, of

ement or Invention in wing is a the same,

specification. to an improved congcmeut of the cutting-edges 0 required set to the teeth. chain 1 place upon a support-ingf time of triangular form, with guiding and driving pulleys situated at the angles, around which the saw is placed and strained to the required tension. The pulley C is the drivingpulley, and it is mounted in an adjustable bearing controlled by a set-screw, to bring the saw to the proper tension. These pulleys C C C are composed of rectangular disks bolted together, so that the corner of one disk is interposed and projects between two corners of the other disk.

The straight portions a of the sections are received upon the straight part or edges of while the angles or corners of the disk engage with the spaces (Z in the endless chain that are left between the head of one section and the heel of the next one on the same side. By this construction the saw is driven with a regular motion, and no slipping can occur. This frame 1) is mounted upon a that band supported between the two pulleys C C at the presented to the felled, and can be fed or moved forward as the sawing progresses.

The bottom of the fame is provided with friction-rollers a, which bear upon and against the guiding rails or track on the platform E.

In the operation of my invention the guiding track or frame E is fastened to the tree or to the ground in position, and the saw-frame is placed thereon and the driving-pulley set on by power applied to its shaft. The saw-frame is fed forward as the sawing pro- 100 more particularly, of g them up into logs;

to construct a strong shall have band or or jointed age with the saw and s frame forward as the drawings, Figure 1 is show the construcuble teeth.

A with a straight a, to engage with the e driving disk ar shape, to form the 9 pins aspivots, dless band or chain to ill grosses, so that the saw is pressed in aproper degree against the wood.

1n the cross-cutting of trees lying upon the ground the triangular frame is to be raised up and held in a vertical position.

The segments of the band orchain are readily produced from small pieces of metal, and waste pieces can be utilized for this purpose. They are of quadrilateral shape, with a broad cutting end, I), and a narrow heel, I), of suffieient width only to leave enough metal around the rivethole. As thus constructed my invention provides a strong, simple, and cheap machine, readily made by any blacksmith, and easily operated by horse or other power.

I am aware that endless band or link have been made of alternately two links and one link, as shown in Fig. 4. This construction 1 do not claim.

Having thus fully What 1 claim Si'tWS described my invention, as new, and desire to secure by Letters Patent, is-- 1. An endless-chain or fl ibl saw posed of sections each formin single tooth, the alternate teeth cutting upon opposite sides 5 of the kerf and united together by pivot-a1 connections, as shown and described.

EDWARD NUNAN. [L.

foregoing I seal this 28th Witnesses:

0. W. M. SMITH, E. MCCLAIN. 

